Which paper tape hole is bit 1?

Pete Turnbull pete at dunnington.plus.com
Sat Nov 19 09:15:00 CST 2005


On Nov 19 2005,  9:50, Barry Watzman wrote:
> I have a chart of paper tape hole patterns for all 128 characters,
and it
> shows the LSB (bit zero, although the chart numbers them 1-8) as the
edge
> hole on the 3-hole side, with the bits in order 0 to 7 (or 1 to 8).
>
> However, one question, this chart shows the high-order bit (parity
bit)
> punched for every character, no exceptions.  Was that a standard
convention
> in sending ascii files to paper tape?

It was for DEC, at least with PDP-8s.  I don't know about anyone else.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York


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